Title

The AIX SSH daemon must not allow RhostsRSAAuthentication. (Cat II impact)

Discussion

If SSH permits rhosts RSA authentication, a user may be able to log in based on the keys of the host originating the request and not any user-specific authentication.

Check Content

Check the SSH daemon configuration for the "RhostsRSAAuthentication" setting by running: # grep -i RhostsRSAAuthentication /etc/ssh/sshd_config | grep -v '^#' The above command should yield the following output: RhostsRSAAuthentication no If the setting is present and set to "yes", this is a finding.

Fix Text

Edit the "/etc/ssh/sshd_config file", add the following line, and save the change: RhostsRSAAuthentication no Restart the SSH daemon: # stopsrc -s sshd # startsrc -s sshd

Additional Identifiers

Rule ID: SV-215305r991591_rule

Vulnerability ID: V-215305

Group Title: SRG-OS-000480-GPOS-00229

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.